CHAPTER VI 



DRAWING WITH THE MICROSCOPE AND WITH PROJECTION 

 APPARATUS; CLASS DEMONSTRATIONS 



265. Apparatus and material for Chapter VI. 



i. Microscope. 



2. Abbe and Wollaston's camera 

 luridas (fig. 99-100). 



3. Drawing board (fig. 101, 102, 

 109). 



4. Thumb tacks and small tacks 



(§ 275)- 



5. Pencils (§ 275). 



6. Microscope screen (fig. 33). 



7. Microscopic preparations. 



8. Small arc lamp with condenser 



(fig- 49)- 



9. Large projection apparatus (fig. 

 109-112). 



45 mirror or prism (fig. 



109- 

 of 



10 



114). 



11. Mazda stereopticon lamp 

 250 or 400 watts (§ 289,362). 



12. Micrometer, one-half milli- 

 meter, and one in one-tenth and one- 

 hundredth millimeters (fig. 80). 



13. Mounted letters. 



14. Printed letters to put on draw- 

 ings (§ 302). 



15. Carbon drawing pencils (§ 290). 



16. Graphite drawing pencils 

 (§ 288-290). 



17. Water-proof India ink (Hig- 

 gin's or Weber's) (§ 2S8-290). 



18. Crow quill pens (§ 288). 



19. Right line pen and other 

 drawing instruments (§ 288). 



20. Erasers. 



21. Tracing paper (§ 2S6). 



22. Whatman's hot-pressed draw- 

 ing paper (§ 291). 



23. Reynold's bristol-board (§291). 



24. Developing photographic paper 

 (§ 2S9-290). 



25. Camera obscura or photo- 

 graphic camera and material for 

 negatives (fig. 107, § 285-289). 



26. Ruby glass (§ 288-291). 



27. Gihon's opaque and fine brush 

 (§ 291). 



28. Metric scale (fig. 104). 



29. T-square and triangles (§ 303). 

 ■30. Air-brush (§291). 



31. Simple microscopes (§ 306). 



32. Demonstration compound mi- 

 croscopes (§ 307). 



33. Traveling microscope (§ 308). 



34. Indicator ocular (§ 309). 



35. Markers for ringing (§ 310). 



36. Projection microscope (§311). 



37. Masking paper (§ 312a). 



38. Objectives, amplifiers, oculars 



(§ 3i3)- 



39. Prism or 45 mirror (§ 315). 



40. Hay infusion (§ 211, 315). 



41. Four- window daylight lantern 

 (§316). 



42. Demonstration table for 8 

 microscopes (§ 316). 



Drawing 



§ 266. Methods of drawing. — There are five principal methods 

 for obtaining drawings in general, and all the methods are applicable 

 to the production of drawings of microscopic objects: 



160 



